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-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2001.468 -- Microsoft Security Bulletin MS01-054 Invalid Universal Plug and Play Request can Disrupt System Operation 7 November 2001 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Universal Plug and Play (UPnP) service Vendor: Microsoft Operating System: Windows XP Windows ME Windows 98SE Windows 98 Impact: Denial of Service - --------------------------BEGIN INCLUDED TEXT-------------------- - - - ---------------------------------------------------------------------- Title: Invalid Universal Plug and Play Request can Disrupt System Operation Date: 01 November 2001 Software: Windows 98, Windows ME, Windows XP Impact: Denial of Service Bulletin: MS01-054 Microsoft encourages customers to review the Security Bulletin at: http://www.microsoft.com/technet/security/bulletin/MS01-054.asp. - - - ---------------------------------------------------------------------- Issue: ====== The Universal Plug and Play (UPnP) service allows computers to discover and use network-based devices. Windows ME and XP include native UPnP services; Windows 98 and 98SE do not include a native UPnP service, but one can be installed via the Internet Connection Sharing client that ships with Windows XP. A vulnerability results because the UPnP service does not correctly handle certain types of invalid UPnP requests. On Windows 98, 98SE, and ME systems, receiving such a request could cause a variety of effects ranging from slow performance to system failure. On Windows XP, the effect is less serious as the flaw consists of a memory leak. Each time a Windows XP system received such a request, a small amount of system memory would become unavailable; if repeated many times, it could deplete system resources to the point where performance slowed or stopped altogether. Mitigating Factors: ==================== - Standard firewalling practices (specifically, blocking ports 1900 and 5000) could be used to protect corporate networks from Internet-based attacks. - On Windows 98 and 98SE, there is no native UPnP support for these systems. Windows 98 and 98SE systems would only be affected if the Internet Connection Sharing Client from Windows XP had been installed on the system. - On Windows ME, UPnP supportis neither installed nor running by default. (However, some OEMs do configure pre-built systems with the service installed and running). - On Windows XP, the Internet Connection Firewall, which runs by default, would impede an attacker's ability to locate and attack the system. Patch Availability: =================== - A patch is available to fix this vulnerability. Please read the Security Bulletin at http://www.microsoft.com/technet/security/bulletin/ms01-054.asp for information on obtaining this patch. Acknowledgment: =============== - 'Ken' from FTU (franklin_tech_unlimited@yahoo.com) - - - --------------------------------------------------------------------- THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to use any or all of this information is the responsibility of each user or organisation, and should be done so in accordance with site policies and procedures. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the original authors to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/Information/advisories.html If you believe that your system has been compromised, contact AusCERT or your representative in FIRST (Forum of Incident Response and Security Teams). Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). 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